Stator strip-shaped bar lead welding and lead and connecting plate sealing welding die

Abstract

The utility model discloses a stator bar lead welding and lead and connecting plate seal welding die, which comprises a bottom plate, a limiting block and two fixed clamping columns are fixedly arranged on the bottom plate, the limiting block is positioned between the two fixed clamping columns, a side compression bolt is arranged on each fixed clamping column in a penetrating manner, and the side compression bolts are fixed on the bottom plate. A side pressing block is rotationally arranged on each side pressing bolt, and the two side pressing blocks are located between the two fixing clamping columns and driven by the side pressing bolts to move oppositely or oppositely in the axis direction of the side pressing bolts. The seal welding tool simplifies the welding fixing mode, improves the welding quality, can be universally used for resistance heating welding and medium-frequency induction welding, is convenient to operate, economical, practical, time-saving and labor-saving, saves a large amount of energy by adopting high-frequency welding and being matched with the seal welding tool, and is energy-saving and environment-friendly; and meanwhile, high-frequency welding is adopted, so that the welding of the stator strip-shaped bar lead end socket can be completed at one time with high quality, the service life of the hydro-generator is prolonged, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to large -scale water turbine generator technical field especially, it is a kind of stator bar shape wire stick lead wire welding and lead wire and connecting plate seal welding mould. BACKGROUND

[0002] Stator bar is the core component in large -scale water turbine generator unit, commonly known as the "heart" of generator, current is in the generator stator bar induction, when unit operation, stator bar wire must keep good insulation state with other parts, and also to adapt the influence of running thermal expansion, the quality of stator bar and stator bar lead wire seal welding quality will directly affect unit performance to generator's performance, technical economic index etc. The welding of traditional stator bar shape wire stick lead seal head all uses power frequency large current to carry out resistance welding through carbon block, its defect is that welding time is long, stator bar end insulation is easy to age or damage, reduces the operating life of water turbine generator.

[0003] Therefore we need to design a kind of stator bar shape wire stick lead wire welding and lead wire and connecting plate seal welding mould to solve these problems. INVENTION CONTENTS

[0004] The utility model wants to solve the problem to provide a kind of stator bar shape wire stick lead wire welding and lead wire and connecting plate seal welding mould, using the seal welding mould of the application to the stator bar lead wire end carries out medium frequency induction seal welding, makes lead wire end welding speed to accelerate, prevents the damage to stator bar, prolongs the service life of water turbine generator, in addition, saves a lot of energy by high-frequency welding and the seal welding tooling of the application, and quality is improved, work efficiency is increased.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0006] A kind of stator bar shape wire stick lead wire welding and lead wire and connecting plate seal welding mould, including bottom plate, the bottom plate is fixedly arranged with limiting block and two fixed clamping columns, the limiting block is located between the two fixed clamping columns, side pressing bolt is arranged on each fixed clamping column, side pressing block is rotatably arranged on each side pressing bolt, the two side pressing blocks are located between the two fixed clamping columns, and under the driving of side pressing bolt, it moves along the axis direction of side pressing bolt relative or towards each other.

[0007] Preferably, the side pressing bolt is connected with the fixed clamping column by thread cooperation.

[0008] Preferably, the fixed clamping column is also provided with an auxiliary limiting portion, the auxiliary limiting portion is slidably connected with the fixed clamping column, and one end is fixedly connected with the side pressing block.

[0009] Preferably, the number of the auxiliary limiters is at least two, and the auxiliary limiters are symmetrically distributed along the side pressing bolt.

[0010] Preferably, an upper pressing frame is arranged on the two fixing clamping columns, and an upper pressing block is arranged on the upper pressing frame and located between the two fixing clamping columns.

[0011] Preferably, a connecting hole is arranged on the free end of the fixing clamping column and the upper pressing frame, and the upper pressing frame is connected to the fixing clamping column through a connecting bolt penetrating the connecting hole.

[0012] Preferably, a longitudinal pressing screw is arranged on the upper pressing frame and connected to the upper pressing block through screw thread cooperation at one end.

[0013] The utility model has the advantages and positive effects that:

[0014] The utility model simplifies the welding fixing mode, improves the welding quality, and can be used for resistance heating welding and intermediate frequency induction welding, is convenient to operate, is economic and practical, saves time and effort, in addition, a large amount of energy is saved by using high-frequency welding and cooperating with the sealing welding tool of the utility model, energy saving and environmental protection are realized, meanwhile, high-frequency welding is used to improve the welding of the stator strip-shaped wire rod lead sealing head, so that the welding can be completed once with high quality, the service life of the hydroelectric generator is prolonged, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.

[0016] Figure 1 It is the exploded structural schematic view of the utility model;

[0017] Figure 2 It is the structural schematic view of the utility model for connecting plate and wire rod lead sealing welding;

[0018] Figure 3 It is the structural schematic view of the utility model for sealing welding of two wire rod leads;

[0019] Figure 4 It is the position schematic view of the welding sheet when the connecting plate and the wire rod lead of the utility model are sealed and welded;

[0020] Figure 5 It is the position schematic view of the welding sheet when the two wire rod leads of the utility model are welded.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Lead wire; 2. Limiting block; 3. Sensor; 4. Auxiliary limit; 5. Side clamping bolt; 6. Parallel block; 7. Side clamping block; 8. Upper clamping block; 9. Connecting bolt; 10. Base; 11. Fixing clamp; 12. Connecting plate; 13. Upper clamping frame; 14. Connecting hole; 15. Longitudinal clamping bolt; 16. Welding sheet. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Example 1: As Figures 1-2 As shown, a stator bar lead welding and lead-to-connector plate sealing mold includes a base plate, on which a limiting block 2 and two fixed clamping posts 11 are fixedly disposed. The limiting block 2 is located between the two fixed clamping posts 11. A side clamping bolt 5 is provided through each fixed clamping post 11. A side clamping block 7 is rotatably disposed on each side clamping bolt 5. The two side clamping blocks 7 are located between the two fixed clamping posts 11 and move relative to or towards each other along the axial direction of the side clamping bolt 5 under the drive of the side clamping bolt 5.

[0027] Specifically, the side clamping bolt 5 is connected to the fixed clamping column 11 by a threaded connection, and the two side clamping blocks 7 can be moved by rotating the side clamping bolt 5.

[0028] Furthermore, an auxiliary limiter 4 is also provided through the fixed clamping column 11. The auxiliary limiter 4 is slidably connected to the fixed clamping column 11, and one end is fixedly connected to the side pressure block 7.

[0029] Furthermore, the number of auxiliary limiters 4 is at least two, and they are symmetrically distributed along the side clamping bolts 5. This arrangement can provide stable support for the side clamping blocks 7.

[0030] In this embodiment, the lead wire 1 is sealed to the connecting plate 12, such as... Figure 2 As shown, firstly, the side clamping bolts 5 on the two fixed clamping posts 11 need to be rotated to move the two side clamping blocks 7 relative to each other. At this time, the distance between the two side clamping blocks 7 will increase. Then, two sensors 3 are placed between the two side clamping blocks 7, and two connecting plates 12 are inserted between the two sensors 3. Next, the lead wire 1 is placed between the two connecting plates 12, as shown. Figure 4 As shown, to ensure the welding quality of the weld, a welding piece 16 needs to be inserted between the lead wire 1 and the connecting plate 12. Then, the two side clamping bolts 5 are rotated in the opposite direction to move them relative to each other, pushing the inductor 3 and the connecting plate 12 to move. At this time, the two side pressure blocks 7 do not need to be squeezed tightly; they only serve to form and limit the connection plate 12 and the lead wire 1. Then, the inductor 3 is activated to heat the connecting plate 12 and the lead wire 1 using the principle of induction heating. At the same time, the overall temperature rise at the weld is observed. When the molten welding piece 16 overflows (650-700℃), the side clamping bolts 5 are rotated to push the two side pressure blocks 7 to squeeze the weld, with the limiting block 2 as the reference. The temperature continues to rise. When the molten welding piece 16 overflows evenly and the weld bead is round and full, the heating is stopped (the maximum temperature of the joint does not exceed 800℃). The brazing process is over. Then, the weld is left to stand until it cools naturally. At this time, the lead wire 1 and the connecting plate 12 are sealed together.

[0031] Example 2: Based on Example 1, as follows Figure 3 As shown, an upper pressure frame 13 is provided on two fixed clamping columns 11, and an upper pressure block 8 is provided on the upper pressure frame 13. The upper pressure block 8 is located between the two fixed clamping columns 11.

[0032] Furthermore, both the free ends of the fixed clamping column 11 and the upper pressure frame 13 are provided with connecting holes 14. The upper pressure frame 13 and the connecting holes 14 on the fixed clamping column 11 are connected by connecting bolts 9 passing through the connecting holes 14.

[0033] Furthermore, a longitudinal clamping screw is provided through the upper pressure frame 13. The longitudinal clamping screw is connected to the upper pressure frame 13 by a threaded connection, and one end is rotatably connected to the upper pressure block 8.

[0034] In this embodiment, the two lead wires 1 are welded together, such as... Figure 3 As shown, first, rotate the side clamping bolts 5 on the two fixed clamping posts 11 to move the two side clamping blocks 7 relative to each other. At the same time, rotate the longitudinal clamping screw to move the upper clamping block 8 upward. At this time, the distance between the two side clamping blocks 7 will increase, and the distance between the upper clamping block 8 and the limiting block 2 will also increase. Then, place two sensors 3 on both sides of the limiting block 2. Next, place the two lead wires 1 to be welded between the two sensors 3. Then, press the joint block 6 onto the two lead wires 1. Figure 5 As shown, to ensure the welding quality of the weld, welding plates 16 need to be inserted between the two lead wires 1 and on both sides of the lead wire 1. Then, the two side clamping bolts 5 are rotated in the opposite direction to move them relative to each other, pushing the sensor 3 to move. At the same time, the longitudinal clamping screw is rotated to make the upper pressure block 8 contact the parallel block 6. At this time, the upper pressure block 8 and the two side pressure blocks 7 do not need to be squeezed tightly; they only serve to limit the forming of the lead wire 1. Then, the sensor 3 is activated to heat the connecting plate 12 and the lead wire 1 using the principle of induction heating. At the same time, the weld is observed. Regarding the overall temperature rise at the joint, when molten weld nugget 16 overflows (650-700℃), using limit block 2 as a reference, rotate side clamping bolt 5 to push two side clamping blocks 7 to squeeze the weld joint. At the same time, rotate longitudinal clamping screw and use upper clamping block 8 to push parallel block 6 to move. Then continue to heat up. When molten weld nugget 16 overflows evenly and the weld corner is round and full, stop heating (the highest temperature at the weld joint does not exceed 800℃). The brazing process is over. Then let the weld joint stand until it cools naturally. At this time, the two lead wires 1 are sealed together.

[0035] It is important to note that when welding the connecting plate 12 to the lead wire 1, the center of the two side pressure blocks 7 and the lead wire 1 must be on a straight line. When welding two lead wires 1, the center of the two side pressure blocks 7, the parallel block 6, and the lead wire 1 must be on a straight line. This ensures that the lead wire 1 can be subjected to uniform force during continued compression.

[0036] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A stator bar wire bar soldering and wire-to-plate seal welding die comprising a base plate, characterized by: The bottom plate is fixedly provided with a limiting block (2) and two fixed clamping columns (11), the limiting block (2) is located between the two fixed clamping columns (11), a side pressing bolt (5) is arranged on each fixed clamping column (11), a side pressing block (7) is rotatably arranged on each side pressing bolt (5), the two side pressing blocks (7) are located between the two fixed clamping columns (11), and are driven by the side pressing bolt (5) to move along the axis direction of the side pressing bolt (5).

2. A stator bar strip wire bonding and wire to plate seal bonding die according to claim 1, characterized in that: The side pressing bolt (5) and the fixed clamping column (11) are connected through thread cooperation.

3. A stator bar strip wire bonding and wire to pad seal bonding die according to claim 2, characterized in that: An auxiliary limiting block (4) is also arranged on the fixed clamping column (11) and is in sliding connection with the fixed clamping column (11), and one end is fixedly connected with the side pressing block (7).

4. A stator bar strip wire bonding and wire to pad seal bonding die according to claim 3, characterized in that: The number of the auxiliary limiting block (4) is at least two, and the auxiliary limiting blocks (4) are symmetrically distributed along the side pressing bolt (5).

5. A stator bar strip wire bonding and wire to pad seal bonding die according to claim 1, characterized in that: Two upper pressing frames (13) are arranged on the two fixed clamping columns (11), the upper pressing frame (13) is provided with an upper pressing block (8), and the upper pressing block (8) is located between the two fixed clamping columns (11).

6. A stator bar strip wire bonding and wire to pad seal bonding die according to claim 5, characterized in that: The free end of the fixed clamping column (11) and the upper pressing frame (13) is provided with a connecting hole (14), and the upper pressing frame (13) is connected through a connecting bolt (9) penetrating the connecting hole (14) after overlapping the connecting hole (14) on the fixed clamping column (11).

7. A stator bar strip wire bonding and wire to pad seal bonding die according to claim 5, characterized in that: A longitudinal pressing screw is arranged on the upper pressing frame (13) and is connected with the upper pressing frame (13) through thread cooperation, and one end is rotatably connected with the upper pressing block (8).

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